Pump construction



March 12, 1929. R, K, JACK 1,705,016

PUMP CONSTRUCTION Filed sept. 2, 1921 Patented Mar. 12, 1929.

unirse STATES',

Resumen. JACK, on LANSING, Miei-Ireen, AssrefionA PRATION, F DETRCIT, 'MICHIGAN,

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PUMP I coNsTn-UCTION.

.Application filed September 2, 19,21. Serial No. 497,958.

One of the objects of the inventionis to pro-v vide an improved pump construction simple and inexpensive in manufacture and assembly 1o and durable and eflicient in operation.

A, further object isto provide an improved packing of especial utility in connection withI a pump shaft or the like and adapted to prevent leakage 0f liquid along the shaft.

Further objects and advantages pear from the following description taken in connection with the accompanying drawings, in which j n Fig. 1 is an elevation, partly in section, showing one| en'ibodiment of the invention;

Figs. 2 and 3 vare respectively a side and an en d elevation of a spacer or Washer en'iploycd in connection, with the invention;

Fig. 4: an end elevation of a packing adJr justingnut; andA Fig. 5 is a section on line 5 5 of Fig. 1. v Referring to the drawings, indicates a casingor plate member adapted to be attached to form a closure for the front end of a crank 30 casing of an internal combustion engine (not shown), the crank shaft of which maylbe positioned as indicated at 11. The casing member 10 is formed upon its opposite sides With supporting sleeves 12, 12, in alignment .3 with each other and adapted to receive exten sions from pump casings 111, 14', one of which extensions shown at 13, bolts or screws 15 serving to secure the pump casings to the crank case cover 10. Bushingsl, 16 mounted in the extension sleeves 13 provide bearings for the pump shaft 17 arranged transversely of the engine and driven in any suitable manner as by a gear 18 on the crank shaft meshing With a gear 19 on the pump shaft.

The pump casing members 111, 14 are formedas is usual in pumps of the centrifugal type, with peripheral channel 20-discharging at 21 through the outlet pipes 22 or 22 which outletk pipes may lead respectively to the cooling systems of the two blocks of a V-type engine. Pump cover plates 23, 2 3 having inlet pipes 24, 24 leading from a su1table source of liquid supply, as from a radiator, are secured to the outer faces of the pump.

casings 14, 14, and.enclose,bet\veen the cover vwilll apand casing, pump chambers, as indicated at Mountedwithin the chamber 25 is the impeller 2G secured to the endof ythe shaft 17 to rotate therewith, as by l/Voodrulf keys, rand held from endwise movement by a vcap or washer 27 fastened to the end of the shaft by set screw 23. Passages 29 within thebody of the impellerdeliver liquid to the passage 2O at the periphery of' the casing, the liquid entering 'the passages 29 adjacent to the hub of the impellenns'at 30, from the interior of cover i ln order to facilitate the .manufacture and assembly of the parts, 1' prefer to provide a slight clearance between the impeller and the parts of the easing and cover, s0 that no accurate machining or litt'ing is necessary. This results, of course, in escape of liquid .n'io're or less freely around theperiphery ol the impeller into the chamber 25 and means is provided to prevent discharge of liquidalong the shaft and into the interior of the crank casing. This means comprises, in the embodiment shown, packing 31 within thesleeve extension 13 and retainedbetween Athe end of bushing 16 and an nut 32 screW-threzuhzd on its rexterior to engage with a screw-threaded interior oortion of the extension 13.

In order to provide for the insertion, removal, or adjustmentof the sleeve nut 32, I have designed a combined sealing Washer, spacer, and adjusting device 33 adaptcdto be positioned around the shaft 17 at the outer end of the packing chamber in the pump cas ing.A rllhis spacer is formed Witha liange 34 Which seats on the face of, thecasing around the packing chamber, being retained against Vthe casmgby pressure of Water in chamber 25. Notches 35,01Nk equivalent means, may be provided Yto facilitate engagement With a suitable tool in order torotatethe spacer. Teeth 36 are formed on the inner face of the spacer, which teeth are adapted to lit in slots 37 in the outer endofnut 32, thus providing a connection-between the spacer-and the nut `which permits relative movement.l of the two axially of the shaft but preventsrelative rotation. t Willbeseen, therefore, that by rotation of the spacer 33 the packing gland or nut 32 may be adjusted in or out at Will Without changing the position ofthe spacer axially of the shaft.

The shaft 17 may be provided, if desired,

adjusting gland or sleeve In order topi-Ovide for the drainage, when Y desired, of the pumps and oi the entire cooling system of which the pumps form a par-t,

a drain oook may be connected to one oi' tlie l pump supply conduits, .as atllt), the conduit trom Jdie radiator to tlie pump being tlie lovestipoiiit of tlie system. Tlie drainage oi liquid from .the lower por-tion oi: tlie pump casing is effected by providing a restricted opening or luy-pass l1 from Iii-lie lower p art of the peripheral channel 2O to jtlie intake or supply conduit.

lt will be understood .that :the dat 'l the pump Within casing let parte of tliose slioivn on tlie let side of Fig. 1 and vherein described. deemed -unnecessary' therefore to desc 1iloe in detail tlie construction of the `second pump.

Variations-in details of construction may be made Without departing from the spirit and scope of tlie invention and therefore I do not Wislito be limited to tlie specilie construction Shown except as requiredby tlie language of tlieappend-ed claims in view of the prior art.

I claim: Y l Y l. In packing 'devices for rotary pumps the combination with a pump shaft, an iin- Vpeller mounted thereon and a Casing in Wliicli said impeller is positioned and into Wfliicli nromoie said shaft extends, of packing surrounding .tlie combination Witli'ia pump sliaiit, an impeller iiiounted'tliereon and a Casing in Wliicli said impellei' is positioned and into which said sliai't e nds, of packingsurrounding said sliai't, Ygland in screw-tlireaded engagement with said'casing and adapted by rotation 'to compress said packing, anda'sealing washer surrounding said slialt and so posi tionedbetween said impeller and said casing as to obstruetaoeess ofl liquid from said easing` to saidl gland, sai-d Waslier and gland provided witli inter-engaging parts whereby rotationy of tlie Washer causes rotationo'f tlie gland.

In packing devices for pump shafts or the like, a casing Ihaving a c'liainber for liquid under pressure, a shaft entering said chamber, a packing space being provided around said sha-tt and opening into said chamber, packing in said space surrounding said sliailt, a gland adapted to compress said packing an d a washer surrounding said sliait and positioned to seal'tlie open end of said packing space, means being provided Wherevby rotation of said Washer eects movement of said gland to compress saidpacking.

ln testimony whereof l' alix my signature.

ROBERT K. JACK. 

